JP2003040751A - Hair removal agent - Google Patents

Abstract

(57) [Summary] [Object] To provide a hair removal agent that is less irritating and can be easily removed from the skin and has excellent handleability. [Constitution] At least one kind of tackifier such as terpene resin, terpene phenol resin, rosin resin, rosin acid alcohol, polyvinyl methyl ether, and preferably at least one tackifier which is liquid at 70 ° C., and polyoxyethylene hydrogenated castor oil Water-soluble wax, and further contains an emulsifier such as sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil,
A depilatory composition containing no solvent is applied on a support to obtain a depilatory agent according to the present invention. This depilatory composition becomes emulsified and cloudy when in contact with water, and is easily washed off from the skin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a depilatory agent, that is, a depilatory agent which is applied to human skin and peeled to remove hair.

[0002]

2. Description of the Related Art As a depilatory for physically removing hair, an adhesive type using an adhesive and a wax type using a wax have been conventionally known. Although the adhesive type has been provided with excellent depilatory properties and adhesive residue due to the improved adhesive, it has a problem that the pain when peeling from the skin is still large. In addition, the wax type has a good hair removal property like the adhesive type, and has a merit that the wax agent slightly remains on the skin surface at the time of hair removal, so that the skin is not damaged and there is little pain during hair removal. However, the wax type requires a special device such as a remover to remove the wax agent left on the skin, and a solvent such as alcohol or paraffin needs to be used, so that the handling is troublesome. there were. Further, there is a drawback that the skin is damaged by these solvents.

[0003]

As a solution to these problems, a depilatory containing water-soluble and / or alcohol-soluble resin, a softening agent and a solvent as a main component is disclosed in JP-A-63-63.
It is disclosed in Japanese Patent Publication No. -115811. However, since this hair remover contains alcohol as a solvent, it is difficult to use for people with alcohol hypersensitivity, and it takes a long time to evaporate the solvent to dry it, and the hair removal treatment takes a relatively long time. Was required.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is less irritating without using a special device such as a remover, and is easy to remove from the skin. The purpose is to provide a drug.

[0005]

The depilatory according to the present invention comprises:
It is characterized in that it is composed of a depilatory composition containing a tackifier and an emulsifier as a main component and containing no solvent, and that the depilatory composition is emulsified and becomes cloudy when contacted with water.

In the present invention, it is preferable that the depilatory composition further contains a water-soluble wax, and it is preferable to use polyoxyethylene hydrogenated castor oil as the water-soluble wax.

Further, in the present invention, it is preferable that the depilatory composition is formed on at least one side of a support and shaped into a sheet or bag.

In these depilatory agents, it is preferable to use at least one of terpene resin, terpene phenol resin, rosin resin, rosin acid alcohol, and polyvinyl methyl ether as the tackifier, and at least one of them is liquid at 70 ° C. It is desirable to use certain tackifiers. Further, it is preferable to use at least one kind of sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene hydrogenated castor oil as the emulsifier.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The hair remover according to the present invention contains a tackifier and an emulsifier as main components, does not contain a solvent, and preferably comprises a hair remover composition further containing a water-soluble wax. Is. Examples of the tackifier used in the present invention include terpene resins, rosin resins, xylene resins, petroleum resins, and the like.
Above all, any one kind or two or more kinds of the terpene resin, the terpene phenol resin, the rosin resin, the rosin acid alcohol, and the polyvinyl methyl ether is particularly preferably used. Of these, at least one liquid at 70 ° C. is preferably used. This is because if the solid resin at 70 ° C. is mainly contained in the depilatory composition, the emulsifying property is lowered and the suspending property in water is deteriorated. The content of the tackifier is 60 to 98% by weight, preferably 70 to 95% by weight in the depilatory composition. Further, the resin which is liquid at 70 ° C. is preferably blended in an amount of 50% by weight or more in the tackifier for the above reason.

Examples of the emulsifier include polyoxyethylene alkyl ether, polyoxyalkylene alkyl ether, polyoxyethylene derivatives such as polyoxyethylene lanolin derivative, sorbitan fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene sorbitol fatty acid ester, and glycerin fatty acid. Various nonionic surfactants such as esters, anionic surfactants such as polyoxyethylene alkyl ether phosphate / phosphate, and cationic surfactants such as aliphatic amine salts and aliphatic quaternary ammonium salts Etc.
Among these emulsifiers, sorbitan fatty acid ester,
Glycerin fatty acid ester and polyoxyethylene sorbitan fatty acid ester are particularly preferably used from the viewpoint of washability and safety. These emulsifiers may be unnecessary depending on the tackifier used, but in consideration of the emulsifying property in water, it is preferable to use at least one kind or a combination of two or more kinds. Medium 1
-30% by weight, preferably 1-20% by weight, more preferably 3-15% by weight. If the amount is less than 1% by weight, the depilatory composition is not easily emulsified even by washing with water and cannot be easily washed off. Further, if it is blended in an amount of more than 30% by weight, the cohesive force of the tackifier is lowered, and the hair removal property is liable to be lowered.

The water-soluble wax may be one which is uniformly dispersed in the tackifier and can be easily emulsified by an emulsifier, and when applied to the skin, it has an appropriate oil content that can reduce irritation to the skin. Although any water-soluble wax can be used as long as it gives, polyoxyethylene hydrogenated castor oil is preferably used in the present invention. This polyoxyethylene hydrogenated castor oil has a function as an emulsifier by itself while giving an appropriate oil content.
It is optimal for the purpose of the present invention. The content of the water-soluble wax is approximately 10% by weight to 20% by weight in the depilatory composition.

As described above, the depilatory agent according to the present invention comprises a tackifier and an emulsifier as main components, and a water-soluble wax added thereto, and is uniformly mixed without using a solvent such as water or ethanol. It is a thing. That is, it is obtained by heating and dissolving the above-mentioned tackifier, adding an emulsifier and a water-soluble wax thereto, and uniformly stirring the mixture, and it is usually applied on a suitable support to obtain a sheet-like or It is shaped like a bag.

As the support, various supports used for general patches can be used. For example, various plastic films such as polyester film and polypropylene film, and laminates of these films and paper, A laminated product of the above films and a non-woven fabric may be mentioned.

Further, in the above depilatory composition, in order to adjust the hardness, suitable hardness adjusting agents such as castor wax, castor hydrogenated oil and paraffin are added, and antioxidants, fragrances, etc. Various additives can also be added.

This depilatory has adhesiveness at room temperature as in the case of the conventional adhesive depilatory, and is adhered to the skin as it is. Therefore, when this product is applied to the skin, the depilatory composition immediately entangles with body hair. Immediately thereafter, or after leaving for a while, the hair remover composition can be physically removed by pulling it off at once in a state where the hair remover composition is sufficiently entangled with the hair.

As the final form of the present invention, not only the depilatory composition layer formed on one side of the support, but also a three-layer structure of support / depilatory composition layer / support Examples thereof include those used so that the bodies are peeled apart from each other, or those in which a depilatory composition layer is laminated on one surface of a support are folded and the depilatory composition layers are made to face each other to form a bag. Further, when the depilatory composition layer is exposed, a release paper may be attached and peeled off at the time of use. In order to prevent the depilatory composition from flowing out during storage, the depilatory composition layer You may make it seal the support body of the circumference | surroundings. The release paper is preferably subjected to a known easy release treatment such as applying a silicone-based release agent.

The depilatory agent of the present invention does not use a solvent such as alcohol which may give a stimulant, and is used as it is on the skin as is the case with conventional adhesive depilatory agents. Moreover, since the depilatory composition contains an emulsifier, it is easily emulsified and clouded with water, and the depilatory composition remaining on the skin is easily washed off with water. That is, in the present invention, the term "emulsification / cloudiness" means that the depilatory composition remaining on the skin is suspended to the extent that it is washed away with water. It means that they are easily separated. Furthermore, since a water-soluble wax is used in the depilatory in addition to the tackifier, the irritation to the skin is reduced as compared with the case where only the tackifier is used. In particular, when a water-soluble wax that functions as an emulsifier, such as polyoxyethylene hydrogenated castor oil, is used, it is possible to simultaneously reduce the irritation to the skin and obtain the emulsifying property. As described above, the hair remover of the present invention is as easy to use as the conventional adhesive-type hair remover,
Moreover, there is little irritation.

[0018]

The present invention will be described in more detail based on the examples of the present invention. Needless to say, the present invention is not limited to the following examples. Further, in the following, “part” means “part by weight” and “%” means “% by weight”.

Example 1 10 parts of hydrogenated rosin ester (softening point 75 ° C.) was liquefied in an oil bath at 100 ° C., 50 parts of hydrogenated rosin ester (liquid state at room temperature), 20 rosin acid alcohol. And 20 parts of polyoxyethylene hydrogenated castor oil (HLB15) are added and mixed with stirring. The obtained uniform depilatory composition was formed into a film having a thickness of 100 μm on a polyester film having a thickness of 50 μm, and release paper was laminated on the film to prepare the depilatory of Example 1.

Example 2 60 parts of hydrogenated rosin ester (liquid at room temperature) in an oil bath at 100 ° C., 25 parts of rosin acid alcohol, polyoxyethylene hydrogenated castor oil (H
LB15) (15 parts) was added, and the mixture was stirred and mixed, to prepare a depilatory of Example 2 in the same manner as in Example 1.

Example 3 In an oil bath at 100 ° C., 60 parts of hydrogenated rosin ester (liquid at room temperature), 30 parts of polyvinyl methyl ether, and 10 parts of polyoxyethylene hydrogenated castor oil (HLB15) were added and stirred. Mix, Example 1
A depilatory of Example 3 was prepared in the same manner as in.

(Example 4) 60 parts of hydrogenated rosin ester (liquid at room temperature), 25 parts of rosin acid alcohol, polyoxyethylene hydrogenated castor oil (H
LB15) 15 parts, polyoxyethylene sorbitan fatty acid ester (HLB16.7) (trade name "Reodol S
-L120 ", manufactured by Kao Corporation) was added and mixed by stirring to prepare a depilatory of Example 4 in the same manner as in Example 1.

(Example 5) 60 parts of hydrogenated rosin ester (liquid at room temperature), 25 parts of rosin acid alcohol, polyoxyethylene hydrogenated castor oil (H
LB15) 15 parts, polyoxyethylene sorbitan fatty acid ester (HLB10.5) (trade name "Reodol T
W-S120 "(manufactured by Kao Corporation) 10 parts were added and mixed by stirring to prepare a depilatory of Example 5 in the same manner as in Example 1.

Comparative Example 1 10 parts of hydrogenated rosin ester (softening point 75 ° C.) was liquefied in an oil bath at 100 ° C., 60 parts of hydrogenated rosin ester (liquid state at room temperature), and rosin acid alcohol 30 Parts were added and mixed by stirring to prepare a depilatory of Comparative Example 1 in the same manner as in Example 1.

(Comparative Example 2) In a 100 ° C. oil bath, 70 parts of hydrogenated rosin ester (liquid at room temperature) and 30 parts of rosin acid alcohol were added and mixed by stirring. Two hair removers were made.

Comparative Example 3 In a 100 ° C. oil bath, 65 parts of hydrogenated rosin ester (liquid at room temperature) and 35 parts of polyvinyl methyl ether were added and mixed by stirring. 3 hair removers were made.

[Evaluation Test] (Hair Removal Property) The hair removal agents of Examples and Comparative Examples obtained above were subjected to the following evaluation tests. For evaluation, each depilatory was cut into a size of 25 mm width x 80 mm length, an appropriate amount of water was applied to the entire surface of the depilatory composition layer, and then the adhesive sheet was applied to the upper arm along the flow of hair to be removed. I stuck it. After leaving for a while, the end of the depilatory was held and peeled off in one direction in the direction opposite to the hair flow, and the degree of depilation was evaluated in the following three stages. ◯: Hair was removed cleanly without irritation. Δ: Hair was removed without irritation, but slight hair remained. X: There was irritation and hair remained.

(Washability) A small amount of the depilatory composition was scraped from the depilatory, placed on the back of the hand, allowed to stand for about 1 minute and washed with tap water, and the state of adhesive residue was evaluated according to the following two grades. ◯: Rinse off cleanly. X: The depilatory composition remained on the skin.

The results are shown in Table 1. As shown in Table 1, the depilatories of the Examples all showed good results in both depilatory properties and water washability. On the other hand, in the depilatory of Comparative Example, although the depilatory properties were good, these do not contain an emulsifier and a water-soluble wax,
There was a risk that it could not be washed off easily if there was adhesive residue because of poor water washability.

[0030]

[Table 1]

[0031]

The depilatory composition of the present invention comprises a depilatory composition containing a tackifier and an emulsifier as a main component, and thus has excellent depilatory properties like conventional depilatory compositions.
Since it does not contain a solvent, the irritation to the skin due to the solvent can be reduced. Moreover, because of the emulsifier contained, the depilatory composition can be easily emulsified and turned cloudy upon contact with water, and can be easily washed off with water. Furthermore, by blending the water-soluble wax, the irritation to the skin is further reduced by the blended water-soluble wax. In particular, when polyoxyethylene hydrogenated castor oil is used as the water-soluble wax, it also functions as an emulsifier, and therefore, by adding a small amount of components to the tackifier, a depilatory which is gentle on the skin and easy to handle can be formed.

As described above, according to the present invention, it is possible to provide a hair remover which is as easy to use as the conventional adhesive type hair remover and has less irritation.

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Claims (7)

[Claims] 1. A depilatory composition comprising a tackifier and an emulsifier as main components and containing no solvent, and when contacted with water,
A depilatory, wherein the depilatory composition is emulsified and becomes cloudy. 2. The depilatory composition according to claim 1, wherein the depilatory composition further contains a water-soluble wax. 3. The depilatory agent according to claim 2, wherein the water-soluble wax is polyoxyethylene hydrogenated castor oil. 4. The depilatory agent according to claim 1, wherein the depilatory composition is formed into a sheet shape or a bag shape formed on at least one surface of a support. . 5. The tackifier is terpene resin, terpene phenol resin, rosin resin, rosin acid alcohol,
It is at least 1 sort (s) of polyvinyl methyl ether, The depilatory of any one of Claim 1, 2, 3 or 4 characterized by the above-mentioned. 6. The depilatory agent according to claim 5, wherein at least one of the tackifiers is liquid at 70 ° C. 7. The emulsifier is at least one of sorbitan fatty acid ester, glycerin fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene hydrogenated castor oil.
7. The hair remover according to any one of 1 to 6.